Home / 80,800.48-121,686.91-71,556.76

Finding the Fourth Proportional to 80,800.48, 121,686.91 and 71,556.76

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Solution

The fourth proportional to 80,800.48, 121,686.91 and 71,556.76 is: 107,765.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,800.48 : 121,686.91 = 71,556.76 : x
  2. Step 2: Convert to fraction form
    80,800.48/121,686.91 = 71,556.76/x
  3. Step 3: Cross multiply
    80,800.48x = 121,686.91 × 71,556.76
  4. Step 4: Simplify right side
    80,800.48x = 8,707,521,014.01
  5. Step 5: Solve for x
    x = 8,707,521,014.01/80,800.48
  6. Step 6: Final answer
    x = 107,765.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.